WO2022185746A1 - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
WO2022185746A1
WO2022185746A1 PCT/JP2022/001484 JP2022001484W WO2022185746A1 WO 2022185746 A1 WO2022185746 A1 WO 2022185746A1 JP 2022001484 W JP2022001484 W JP 2022001484W WO 2022185746 A1 WO2022185746 A1 WO 2022185746A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixed terminal
contact
fixed
movable contact
electromagnetic relay
Prior art date
Application number
PCT/JP2022/001484
Other languages
French (fr)
Japanese (ja)
Inventor
直樹 川口
剛 西田
亮太 箕輪
Original Assignee
オムロン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オムロン株式会社 filed Critical オムロン株式会社
Priority to DE112022000457.6T priority Critical patent/DE112022000457T5/en
Priority to CN202280015556.0A priority patent/CN116888702A/en
Priority to US18/278,619 priority patent/US20240128034A1/en
Priority to KR1020237027731A priority patent/KR20230130106A/en
Publication of WO2022185746A1 publication Critical patent/WO2022185746A1/en

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00Details of electromagnetic relays
    • H01H50/16Magnetic circuit arrangements
    • H01H50/36Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/38Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00Details of electromagnetic relays
    • H01H50/54Contact arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • the present invention relates to electromagnetic relays.
  • electromagnetic relays In electromagnetic relays, an arc occurs at the contacts when the current is interrupted. Therefore, some electromagnetic relays are equipped with magnets for extinguishing arcs. The Lorentz force acting on the arc by the magnet elongates the arc, thereby rapidly extinguishing the arc.
  • a pair of magnets are arranged outside the first fixed contact and the second fixed contact.
  • a pair of magnets are arranged apart from each other in the longitudinal direction of the movable plate.
  • a pair of magnets generate a magnetic field for extending the arc in a direction crossing the longitudinal direction of the movable plate.
  • An object of the present invention is to suppress deterioration in breaking performance due to arc short-circuiting between fixed terminals in an electromagnetic relay.
  • An electromagnetic relay includes a first fixed terminal, a first fixed contact, a second fixed terminal, a second fixed contact, a first movable contact, a second movable contact, and a movable contact piece. , a drive, an outer magnet, and an inner magnet.
  • the first fixed contact is connected to the first fixed terminal.
  • the second fixed terminal is spaced apart in the first direction from the first fixed terminal.
  • the second fixed contact is connected to the second fixed terminal.
  • the first movable contact is arranged to face the first fixed contact in the second direction.
  • the second direction is a direction crossing the first direction.
  • the second movable contact is arranged to face the second fixed contact in the second direction.
  • the movable contact piece is connected to the first movable contact and the second movable contact.
  • the driving device moves the movable contact piece in the second direction.
  • the outer magnet is arranged outside the first fixed terminal and the second fixed terminal.
  • the outer magnet generates a magnetic field for extending arcs generated between the first fixed contact and the first movable contact and between the second fixed contact and the second movable contact.
  • At least a portion of the inner magnet is arranged between the first fixed terminal and the second fixed terminal when viewed from the second direction.
  • the inner magnet generates a magnetic field for extending the arc in a third direction.
  • the third direction is a direction crossing the first direction and the second direction.
  • the arc is extended by the magnetic field generated by the outer magnet.
  • the arc is thereby quickly extinguished.
  • the short-circuited arc is extended in the third direction by the magnetic field generated by the inner magnet.
  • the short-circuited arc between the first fixed terminal and the second fixed terminal can be quickly extinguished.
  • deterioration in the breaking performance of the electromagnetic relay is suppressed.
  • the electromagnetic relay may further include a projecting portion.
  • the protrusion may be arranged in a third direction with respect to the outer magnet.
  • the protrusion may extend towards the inner magnet. In this case, the arc extended in the third direction is expanded to the left and right of the protrusion. The arc is thereby quickly extinguished.
  • the protrusion may have a tapered shape toward the inner magnet. In this case, the arc is more effectively spread left and right by the protrusion. The arc is thereby quickly extinguished.
  • the protrusion may be made of insulating material. In this case, the arc is quickly extinguished.
  • the first fixed terminal may include a first corner directed to the outside of the first fixed terminal.
  • the direction in which the arc extends from the first fixed terminal can be controlled by the first corner. Thereby, the arc can be easily extended toward the outside of the first fixed terminal.
  • the second fixed terminal may include a second corner facing outward of the second fixed terminal.
  • the direction in which the arc extends from the second fixed terminal can be controlled by the second corner. Thereby, the arc can be easily extended toward the outside of the second fixed terminal.
  • the inner magnet may include a first surface and a second surface.
  • the second surface may be closer to the first stationary contact and the second stationary contact than the first surface.
  • the inner magnet may include an intermediate portion, a first portion, and a second portion.
  • the intermediate portion may be positioned between the first fixed terminal and the second fixed terminal when viewed from the second direction.
  • the first portion may overlap the first fixed terminal when viewed from the second direction. Second part. It may overlap with the second fixed terminal when viewed from the second direction. In this case, the range over which the arc is extended by the magnetic field from the inner magnet is increased.
  • FIG. 4 is a cross-sectional view of an electromagnetic relay in an open state;
  • FIG. 4 is a cross-sectional view of the electromagnetic relay in a closed state; It is an enlarged view of a contact device.
  • FIG. 2 is a sectional view along IV-IV in FIG. 1; It is a figure which shows the electromagnetic relay which concerns on a 1st modification. It is a figure which shows the electromagnetic relay which concerns on a 2nd modification. It is a figure which shows the electromagnetic relay which concerns on a 3rd modification. It is a figure which shows the electromagnetic relay which concerns on a 4th modification. It is a figure which shows the electromagnetic relay which concerns on a 5th modification. It is a figure which shows the electromagnetic relay which concerns on a 6th modification.
  • FIG. 21 is a diagram showing an electromagnetic relay according to a ninth modification
  • FIG. 20 is a diagram showing an electromagnetic relay according to a tenth modification
  • FIG. 21 is a diagram showing an electromagnetic relay according to an eleventh modified example
  • It is a figure showing the 1st fixed terminal concerning the 11th modification.
  • It is a figure showing other examples of the 1st fixed terminal concerning the 11th modification.
  • FIG. 21 is a diagram showing an electromagnetic relay according to a twelfth modification; It is a figure showing the 1st fixed terminal concerning the 12th modification.
  • FIG. 1 is a cross-sectional view of an electromagnetic relay 1 according to an embodiment.
  • the electromagnetic relay 1 includes a case 2, a contact device 3, and a drive device 4.
  • the case 2 is made of an insulating material such as resin or ceramic.
  • a contact device 3 is accommodated in the case 2 .
  • the contact device 3 includes a first fixed terminal 6, a second fixed terminal 7, a movable contact piece 8, a movable mechanism 9, a first fixed contact 10, a second fixed contact 11, and a first movable contact 12. , and the second movable contact 13 .
  • the direction in which the movable contact piece 8 extends is defined as the first direction (X1, X2).
  • the first directions (X1, X2) include a first longitudinal direction (X1) and a second longitudinal direction (X2).
  • the second longitudinal direction (X2) is opposite to the first longitudinal direction (X1).
  • a direction from the second fixed contact 11 to the first fixed contact 10 is defined as a first longitudinal direction (X1).
  • a direction from the first fixed contact 10 to the second fixed contact 11 is defined as a second longitudinal direction (X2).
  • the direction in which the first fixed contact 10 and the first movable contact 12 face each other is defined as the second direction (Z1, Z2).
  • the second directions (Z1, Z2) include upward (Z1) and downward (Z2).
  • the direction from the first movable contact 12 to the first fixed contact 10 is defined as upward (Z1).
  • a direction from the first fixed contact 10 to the first movable contact 12 is defined as downward (Z2).
  • the first fixed terminal 6, the second fixed terminal 7, the movable contact piece 8, the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are electrically conductive. It is made of a material that is flexible.
  • the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 are made of metal materials known as terminal materials such as phosphor bronze, beryllium copper, brass, or tough pitch copper.
  • the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 may be made of materials different from these materials.
  • the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are made of metal known as a contact material such as copper-based metal or silver-based metal.
  • the first fixed terminal 6 and the second fixed terminal 7 extend in the second direction (Z1, Z2).
  • the first fixed terminal 6 and the second fixed terminal 7 have, for example, a cylindrical shape.
  • the first fixed terminal 6 and the second fixed terminal 7 are spaced apart from each other in the first direction (X1, X2).
  • a first fixed contact 10 is connected to the first fixed terminal 6 .
  • a second fixed contact 11 is connected to the second fixed terminal 7 .
  • the first fixed contact 10 and the second fixed contact 11 are arranged inside the case 2 .
  • the movable contact piece 8 , the first movable contact 12 and the second movable contact 13 are arranged inside the case 2 .
  • the first movable contact 12 and the second movable contact 13 are connected to the movable contact piece 8 .
  • the first movable contact 12 faces the first fixed contact 10 .
  • the first movable contact 12 can be brought into contact with and separated from the first fixed contact 10 .
  • the second movable contact 13 faces the second fixed contact 11 .
  • the second movable contact 13 can be brought into contact with and separated from the second fixed contact 11 .
  • the first movable contact 12 is spaced apart from the second movable contact 13 in the first direction (X1, X2).
  • the movable contact piece 8 is movable in the second direction (Z1, Z2).
  • the movable contact piece 8 is movable between an open position shown in FIG. 1 and a closed position shown in FIG.
  • the movable contact piece 8 is in the open position and the movable contacts 12,13 are separated from the fixed contacts 10,11.
  • the movable contacts 12 and 13 are in contact with the fixed contacts 10 and 11 .
  • the direction in which the movable contacts 12 and 13 approach the fixed contacts 10 and 11 is defined as the contact direction.
  • a direction in which the movable contacts 12 and 13 separate from the fixed contacts 10 and 11 is defined as a separation direction.
  • the movable mechanism 9 supports the movable contact piece 8.
  • the movable mechanism 9 includes a drive shaft 15 and contact springs 16 .
  • a drive shaft 15 is connected to the movable contact piece 8 .
  • the drive shaft 15 extends in the second direction (Z1, Z2) and passes through the movable contact piece 8 in the second direction (Z1, Z2).
  • the drive shaft 15 is provided movably in the second directions (Z1, Z2).
  • the contact spring 16 biases the movable contact piece 8 in the contact direction.
  • the drive device 4 includes a coil 21, a spool 22, a movable iron core 23, a fixed iron core 24, a yoke 25, and a return spring 26.
  • the driving device 4 uses electromagnetic force to move the movable contact piece 8 between the open position and the closed position via the movable mechanism 9 .
  • Coil 21 is wound around spool 22 .
  • the movable core 23 and the fixed core 24 are arranged inside the spool 22 .
  • the movable iron core 23 is connected to the drive shaft 15 .
  • the movable core 23 is movable in the second directions (Z1, Z2).
  • the fixed core 24 is arranged to face the movable core 23 .
  • the return spring 26 biases the movable iron core 23 in the opening direction.
  • the electromagnetic relay 1 when the coil 21 is energized, the magnetic force generated by the magnetic field generated by the coil 21 attracts the movable core 23 to the fixed core 24 . Thereby, the movable iron core 23 and the drive shaft 15 move in the contact direction against the biasing force of the return spring 26 . Thereby, the movable contact piece 8 moves to the closed position shown in FIG. After the movable contacts 12 and 13 contact the fixed contacts 10 and 11, the contact spring 16 is compressed by further movement of the drive shaft 15 in the contact direction.
  • the electromagnetic relay 1 has outer magnets 41 and 42 .
  • the outer magnets 41 and 42 generate a magnetic field for extending arcs generated between the first fixed contact 10 and the first movable contact 12 and between the second fixed contact 11 and the second movable contact 13.
  • the outer magnets 41, 42 are arranged outside the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2).
  • the outer magnets 41 and 42 include a first outer magnet 41 and a second outer magnet 42.
  • the first outer magnet 41 and the second outer magnet 42 are permanent magnets.
  • the first outer magnet 41 and the second outer magnet 42 are arranged around the case 2 .
  • the first outer magnet 41 and the second outer magnet 42 may be arranged inside the case 2 .
  • the first outer magnet 41 is arranged in the first longitudinal direction (X1) with respect to the first fixed terminal 6 .
  • the second outer magnet 42 is arranged in the second longitudinal direction (X2) with respect to the second fixed terminal 7 .
  • FIG. 3 is an enlarged view of the contact device 3.
  • FIG. FIG. 4 is a sectional view along IV-IV in FIG.
  • a direction perpendicular to the first directions (X1, X2) and the second directions (Z1, Z2) is defined as a third direction (Y1, Y2).
  • one of the third directions (Y1, Y2) is defined as a first lateral direction (Y1)
  • the direction opposite to the first lateral direction (Y1) is defined as a second lateral direction (Y2). .
  • the first outer magnet 41 and the second outer magnet 42 generate a magnetic field inside the case 2 .
  • An arrow A1 indicated by a two-dot chain line in FIGS. 3 and 4 indicates the magnetic field generated by the first outer magnet 41 and the second outer magnet 42.
  • the first outer magnet 41 and the second outer magnet 42 are arranged with different poles facing each other. For example, the north pole of the first outer magnet 41 faces the south pole of the second outer magnet 42 .
  • a first Lorentz force F1 acts on the arc generated at 12 and 12 .
  • the first Lorentz force F1 acts in the first lateral direction (Y1).
  • the arc is thereby elongated in the direction of the first Lorentz force F1.
  • the second Lorentz force F2 acts on the arc generated between the second fixed contact 11 and the second movable contact 13 by the magnetic field from the second outer magnet 42 .
  • the second Lorentz force F2 acts in the second lateral direction (Y2).
  • the arc is thereby elongated in the direction of the second Lorentz force F2.
  • a first Lorentz force F1' acts on the arc generated at and.
  • the first Lorentz force F1' acts in the second lateral direction (Y2).
  • the arc is thereby elongated in the direction of the first Lorentz force F1'.
  • a second Lorentz force F ⁇ b>2 ′ acts on the arc generated between the second fixed contact 11 and the second movable contact 13 by the magnetic field from the second outer magnet 42 .
  • the second Lorentz force F2' acts in the first lateral direction (Y1).
  • the arc is thereby elongated in the direction of the second Lorentz force F2'.
  • the electromagnetic relay 1 has an inner magnet 43 .
  • the inner magnet 43 generates a magnetic field for extending the short-circuited arc AC1 between the first fixed terminal 6 and the second fixed terminal 7 in the third direction (Y1, Y2).
  • Arrow A2 in FIG. 3 indicates the magnetic field generated by the inner magnet 43 .
  • the inner magnet 43 is arranged, for example, so that the N pole faces downward (Z2).
  • the inner magnet 43 is arranged between the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2).
  • the inner magnet 43 is arranged inside the case 2 . That is, the inner magnet 43 is arranged in the shielding space inside the case 2 for extinguishing the arc.
  • the inner magnet 43 is arranged above (Z1) the first fixed contact 10 and the second fixed contact 11 .
  • the arc is extended by the magnetic fields generated by the outer magnets 41 and 42 .
  • the arc is thereby quickly extinguished.
  • the magnetic field generated by the inner magnet 43 extends the arc in the third direction (Y1, Y2).
  • the structure of the driving device 4 is not limited to that of the above embodiment, and may be modified.
  • the drive device 4 is arranged below the contact device 3 (Z2).
  • the drive device 4 may be arranged in the first direction (X1, X2) or in the third direction (Y1, Y2) with respect to the contact device 3 .
  • the contact direction is upward (Z1) and the release direction is downward (Z2).
  • the contact direction may be downward (Z2) and the release direction upward (Z1).
  • the structure of the contact device 3 is not limited to that of the above embodiment, and may be modified.
  • the number of fixed contacts and movable contacts is not limited to two, and may be more than two.
  • the first fixed contact 10 may be separate from or integrated with the first fixed terminal 6 .
  • the second fixed contact 11 may be separate from or integral with the second fixed terminal 7 .
  • the first movable contact 12 may be separate from or integral with the movable contact piece 8 .
  • the second movable contact 13 may be separate from or integral with the movable contact piece 8 .
  • the arrangement of the magnets is not limited to that of the above embodiment, and may be changed.
  • the first outer magnet 41 and the second outer magnet 42 may be arranged such that the same poles face each other.
  • the S pole of the first outer magnet 41 and the S pole of the second outer magnet 42 may be arranged to face each other.
  • FIG. 5 is a diagram showing an electromagnetic relay 1 according to a first modified example.
  • the first outer magnet 41 and the second outer magnet 42 may be arranged facing each other in the third direction (Y1, Y2).
  • arrows A3 and A4 indicate magnetic fields generated by the first outer magnet 41 and the second outer magnet .
  • the first outer magnet 41 and the second outer magnet 42 may be arranged with different poles facing each other. For example, the north pole of the first outer magnet 41 may face the south pole of the second outer magnet 42 .
  • a first Lorentz force F1 acts on the arc generated between the first fixed contact 10 and the first movable contact 12. do.
  • the first Lorentz force F1 acts in the second longitudinal direction (X2).
  • the arc is thereby elongated in the direction of the first Lorentz force F1.
  • a second Lorentz force F2 acts on the arc generated between the second fixed contact 11 and the second movable contact 13 .
  • the second Lorentz force F2 acts in the first longitudinal direction (X1).
  • the arc is thereby elongated in the direction of the second Lorentz force F2.
  • a third Lorentz force F3 acts on the short-circuited arc AC1.
  • the third Lorentz force F3 acts in the second lateral direction (Y2).
  • the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3.
  • the arc generated between the first fixed contact 10 and the first movable contact 12 causes the first Lorentz force F1' acts.
  • the first Lorentz force F1' acts in the first longitudinal direction (X1).
  • the arc is thereby elongated in the direction of the first Lorentz force F1'.
  • a second Lorentz force F ⁇ b>2 ′ acts on the arc generated between the second fixed contact 11 and the second movable contact 13 .
  • the second Lorentz force F2' acts in the second longitudinal direction (X2).
  • the arc is thereby elongated in the direction of the second Lorentz force F2'.
  • a third Lorentz force F3' acts on the short-circuited arc AC1.
  • the third Lorentz force F3' acts in the first lateral direction (Y1). Thereby, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3'.
  • the first outer magnet 41 and the second outer magnet 42 may be arranged with the same poles facing each other.
  • the arrangement of the first outer magnets 41 and the second outer magnets 42 of the above embodiment and the first outer magnets 41 and the second outer magnets 42 of the first embodiment may be combined. That is, the outer magnets 41 and 42 are arranged in the first longitudinal direction (X1), the second longitudinal direction (X2), the first lateral direction (Y1), and the second lateral direction (Y2) of the case 2, respectively. good too.
  • FIG. 6 is a diagram showing an electromagnetic relay 1 according to a second modified example.
  • the electromagnetic relay 1 may include a first projecting portion 44 and a second projecting portion 45 .
  • the first projecting portion 44 and the second projecting portion 45 may be arranged in the third direction (Y1, Y2) with respect to the outer magnets 41, 42 when viewed from the second direction (Z1, Z2).
  • the first protrusion 44 and the second protrusion 45 may extend between the first fixed contact 10 and the second fixed contact 11 .
  • the first projecting portion 44 may be arranged in the first lateral direction (Y1) with respect to the outer magnets 41 and 42 .
  • the second protrusion 45 may be arranged on the side opposite to the first protrusion 44 in the third direction (Y1, Y2). That is, the second protrusion 45 may be arranged in the second lateral direction (Y2) with respect to the outer magnets 41,42.
  • the first and second protrusions 44 and 45 may extend toward the inner magnet 43 .
  • the first and second protrusions 44 and 45 may have a tapered shape toward the inner magnet 43 .
  • the first protrusion 44 may have a tapered shape in the second horizontal direction (Y2).
  • the second protrusion 45 may have a tapered shape in the first lateral direction (Y1).
  • the first and second protrusions 44 and 45 may be made of an insulating material such as resin or ceramic.
  • the arc AC1 extended in the third direction (Y1, Y2) by the inner magnet 43 is spread in the first direction (X1, X2) by the first and second projections 44, 45.
  • FIG. Arc AC1 is thereby quickly extinguished.
  • FIG. 7 is a diagram showing an electromagnetic relay 1 according to a third modified example.
  • the electromagnetic relay 1 may include a plurality of first protrusions 44A, 44B and a plurality of second protrusions 45A, 45B.
  • FIG. 8 is a diagram showing an electromagnetic relay 1 according to a fourth modification. As shown in FIG. 8, the projections 44, 45 may have a linear shape.
  • FIG. 9 is a diagram showing an electromagnetic relay 1 according to a fifth modification.
  • the fixed terminals 6 and 7 may have a square prism shape.
  • the first fixed terminal 6 may include first corners 6A, 6B facing outward of the first fixed terminal 6 when viewed from the second direction (Z1, Z2).
  • the second fixed terminal 7 may include second corners 7A and 7B extending outward of the second fixed terminal 7 when viewed in the second direction (Z1, Z2).
  • the first corner 6A may face the second longitudinal direction (X2) and the first lateral direction (Y1).
  • the first corner 6B may face the second longitudinal direction (X2) and the second lateral direction (Y2).
  • the second corner portion 7A may face the first longitudinal direction (X1) and the first lateral direction (Y1).
  • the second corner 7B may face the first longitudinal direction (X1) and the second lateral direction (Y2).
  • the direction in which the arc is extended can be controlled in the direction in which the corners 6A, 6B, 7A, and 7B are directed.
  • FIG. 10 is a diagram showing an electromagnetic relay 1 according to a sixth modification.
  • the first corners 6A, 6B and the second corners 7A, 7B may face the third direction (Y1, Y2).
  • the first corner 6A and the second corner 7A may face the first horizontal direction (Y1).
  • the first corner 6B and the second corner 7B may face the second horizontal direction (Y2).
  • the fixed terminals 6 and 7 are not limited to having a square prism shape, and may have other shapes.
  • FIG. 11 is a diagram showing an electromagnetic relay 1 according to a seventh modification. As shown in FIG. 11, the fixed terminals 6 and 7 may have a triangular prism shape. Alternatively, the fixed terminals 6 and 7 may have a shape other than a triangular prism.
  • FIG. 12 is a diagram showing an electromagnetic relay 1 according to an eighth modification. As shown in FIG. 12, the inner magnet 43 may be arranged outside the case 2 .
  • FIG. 13 is a diagram showing an electromagnetic relay 1 according to a ninth modification.
  • the inner magnet 43 may be covered with an insulating material 46 such as resin or ceramic.
  • the entire inner magnet 43 may be covered with insulating material 46 .
  • FIG. 14 is a diagram showing an electromagnetic relay 1 according to a tenth modification.
  • Inner magnet 43 includes a first surface 431 and a second surface 432 .
  • the first surface 431 is the top surface of the inner magnet 43 .
  • a second surface 432 is the lower surface of the inner magnet 43 .
  • the second surface 432 is closer to the first stationary contact 10 and the second stationary contact 11 than the first surface 431 is.
  • the second surface 432 faces the space between the first fixed terminal 6 and the second fixed terminal 7 .
  • At least the second surface 432 of the inner magnet 43 may be covered with the insulating material 46 .
  • the entire inner magnet 43 is located between the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2). That is, the inner magnet 43 is arranged at a position not overlapping the first fixed terminal 6 and the second fixed terminal 7 when viewed from the second direction (Z1, Z2). However, a part of the inner magnet 43 may be arranged at a position overlapping the first fixed terminal 6 and the second fixed terminal 7 when viewed from the second direction (Z1, Z2).
  • FIG. 15 is a diagram showing an electromagnetic relay 1 according to an eleventh modification.
  • the inner magnet 43 may include an intermediate portion 43A, a first portion 43B and a second portion 43C.
  • 43 A of intermediate parts may be located between the 1st fixed terminal 6 and the 2nd fixed terminal 7 seeing from a 2nd direction (Z1, Z2).
  • 43 A of intermediate parts do not need to overlap the 1st fixed terminal 6 and the 2nd fixed terminal 7, seeing from a 2nd direction (Z1, Z2).
  • the first portion 43B may overlap the first fixed terminal 6 when viewed from the second direction (Z1, Z2).
  • the second portion 43C may overlap the second fixed terminal 7 when viewed from the second direction (Z1, Z2).
  • the first fixed terminal 6 may have a U-shape when viewed from the first direction (X1, X2).
  • the first fixed terminal 6 may have an L-shape when viewed from the first direction (X1, X2).
  • the second fixed terminal 7 may have the same shape as the first fixed terminal 6 .
  • FIG. 18 is a diagram showing an electromagnetic relay 1 according to a twelfth modification.
  • the first fixed terminal 6 and the second fixed terminal 7 may extend in the first direction (X1, X2).
  • the first fixed terminal 6 may include a portion extending from the first fixed contact 10 in the first longitudinal direction (X1).
  • the second fixed terminal 7 may include a portion extending from the second fixed contact 11 in the second longitudinal direction (X2).
  • the first fixed terminal 6 may have a plate-like shape.
  • the second fixed terminal 7 may have the same shape as the first fixed terminal 6 .

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

This electromagnetic relay is provided with a first static terminal, a first static contact, a second static terminal, a second static contact, a first movable contact, a second movable contact, a movable contact piece, a drive device, an outside magnet, and an inside magnet. The second static terminal is disposed separated from the first static terminal in a first direction. The first movable contact and the second movable contact are disposed so as to respectively face the first static contact and the second static contact in a second direction. The drive device causes the movable contact piece to move in the second direction. The outside magnet is disposed outside of the first static terminal and the second static terminal. The outside magnet generates a magnetic field for drawing out arcs occurring between the first static contact and the first movable contact and between the second static contact and the second movable contact. As seen from the second direction, at least part of the inside magnet is disposed between the first static terminal and the second static terminal. The inside magnet generates a magnetic field for drawing out arcs in a third direction.

Description

電磁継電器electromagnetic relay
 本発明は、電磁継電器に関する。 The present invention relates to electromagnetic relays.
 電磁継電器では、電流の遮断時に接点においてアークが発生する。そのため、電磁継電器には、アークを消弧するための磁石を備えるものがある。磁石によってアークにローレンツ力が作用することで、アークが引き延ばされ、それによりアークが迅速に消弧される。 In electromagnetic relays, an arc occurs at the contacts when the current is interrupted. Therefore, some electromagnetic relays are equipped with magnets for extinguishing arcs. The Lorentz force acting on the arc by the magnet elongates the arc, thereby rapidly extinguishing the arc.
 例えば、特許文献1の電磁継電器では、第1固定接点と第2固定接点との外側に、一対の磁石が配置されている。一対の磁石は、可動板の長手方向に互いに離れて配置されている。一対の磁石は、可動板の長手方向に交差する方向にアークを引き延ばすための磁界を発生させる。 For example, in the electromagnetic relay of Patent Document 1, a pair of magnets are arranged outside the first fixed contact and the second fixed contact. A pair of magnets are arranged apart from each other in the longitudinal direction of the movable plate. A pair of magnets generate a magnetic field for extending the arc in a direction crossing the longitudinal direction of the movable plate.
特開2011-204480号公報Japanese Patent Application Laid-Open No. 2011-204480
 上述した電磁継電器では、第1固定端子と第2固定端子との間に、ホットガス、或いは金属蒸気が発生することで、第1固定端子と第2固定端子との間でアークが短絡して、アークが継続してしまうことがある。その場合、アークを迅速に消弧することが困難になり、電磁継電器における遮断性能が低下してしまう。本発明の課題は、電磁継電器において、固定端子間においてアークが短絡することによる遮断性能の低下を抑えることにある。 In the electromagnetic relay described above, hot gas or metal vapor is generated between the first fixed terminal and the second fixed terminal, causing an arc to short circuit between the first fixed terminal and the second fixed terminal. , the arc may continue. In that case, it becomes difficult to quickly extinguish the arc, and the interrupting performance of the electromagnetic relay deteriorates. SUMMARY OF THE INVENTION An object of the present invention is to suppress deterioration in breaking performance due to arc short-circuiting between fixed terminals in an electromagnetic relay.
 本発明の一態様に係る電磁継電器は、第1固定端子と、第1固定接点と、第2固定端子と、第2固定接点と、第1可動接点と、第2可動接点と、可動接触片と、駆動装置と、外側磁石と、内側磁石とを備える。第1固定接点は、第1固定端子に接続される。第2固定端子は、第1固定端子から、第1方向に離れて配置される。第2固定接点は、第2固定端子に接続される。第1可動接点は、第2方向において、第1固定接点と向かい合って配置される。第2方向は、第1方向と交差する方向である。第2可動接点は、第2方向において、第2固定接点と向かい合って配置される。可動接触片は、第1可動接点と第2可動接点とに接続される。駆動装置は、可動接触片を第2方向に移動させる。 An electromagnetic relay according to one aspect of the present invention includes a first fixed terminal, a first fixed contact, a second fixed terminal, a second fixed contact, a first movable contact, a second movable contact, and a movable contact piece. , a drive, an outer magnet, and an inner magnet. The first fixed contact is connected to the first fixed terminal. The second fixed terminal is spaced apart in the first direction from the first fixed terminal. The second fixed contact is connected to the second fixed terminal. The first movable contact is arranged to face the first fixed contact in the second direction. The second direction is a direction crossing the first direction. The second movable contact is arranged to face the second fixed contact in the second direction. The movable contact piece is connected to the first movable contact and the second movable contact. The driving device moves the movable contact piece in the second direction.
 外側磁石は、第1固定端子と第2固定端子との外側に配置される。外側磁石は、第1固定接点と第1可動接点との間と、第2固定接点と第2可動接点との間とで発生するアークを引き延ばすための磁界を発生させる。内側磁石は、第2方向から見て、少なくとも一部が第1固定端子と第2固定端子との間に配置される。内側磁石は、第3方向へ、アークを引き延ばすための磁界を発生させる。第3方向は、第1方向及び第2方向に交差する方向である。 The outer magnet is arranged outside the first fixed terminal and the second fixed terminal. The outer magnet generates a magnetic field for extending arcs generated between the first fixed contact and the first movable contact and between the second fixed contact and the second movable contact. At least a portion of the inner magnet is arranged between the first fixed terminal and the second fixed terminal when viewed from the second direction. The inner magnet generates a magnetic field for extending the arc in a third direction. The third direction is a direction crossing the first direction and the second direction.
 本態様に係る電磁継電器では、外側磁石から生じる磁界によってアークが引き延ばされる。それにより、アークが迅速に消弧される。また、アークが第1固定端子と第2固定端子との間で短絡しても、内側磁石から生じる磁界によって、短絡したアークが第3方向へ引き延ばされる。それにより、第1固定端子と第2固定端子との間で短絡したアークを迅速に消弧することができる。それにより、電磁継電器の遮断性能の低下が抑えられる。 In the electromagnetic relay according to this aspect, the arc is extended by the magnetic field generated by the outer magnet. The arc is thereby quickly extinguished. Also, even if an arc short-circuits between the first fixed terminal and the second fixed terminal, the short-circuited arc is extended in the third direction by the magnetic field generated by the inner magnet. As a result, the short-circuited arc between the first fixed terminal and the second fixed terminal can be quickly extinguished. As a result, deterioration in the breaking performance of the electromagnetic relay is suppressed.
 電磁継電器は、突出部をさらに備えてもよい。突出部は、外側磁石に対して第3方向に配置されてもよい。突出部は、内側磁石に向かって延びていてもよい。この場合、第3方向へ引き延ばされたアークが、突起部の左右へ広げられる。それにより、アークが迅速に消弧される。 The electromagnetic relay may further include a projecting portion. The protrusion may be arranged in a third direction with respect to the outer magnet. The protrusion may extend towards the inner magnet. In this case, the arc extended in the third direction is expanded to the left and right of the protrusion. The arc is thereby quickly extinguished.
 突出部は、内側磁石に向かって先細りの形状を有してもよい。この場合、アークが突起部によって、より効果的に左右へ広げられる。それにより、アークが迅速に消弧される。突出部は、絶縁材製であってもよい。この場合、アークが迅速に消弧される。 The protrusion may have a tapered shape toward the inner magnet. In this case, the arc is more effectively spread left and right by the protrusion. The arc is thereby quickly extinguished. The protrusion may be made of insulating material. In this case, the arc is quickly extinguished.
 第1固定端子は、第1固定端子の外側へ向かう第1角部を含んでもよい。この場合、第1角部により、第1固定端子からアークが延びる方向を制御することができる。それにより、アークを第1固定端子の外側へ向けて容易に引き延ばすことができる。 The first fixed terminal may include a first corner directed to the outside of the first fixed terminal. In this case, the direction in which the arc extends from the first fixed terminal can be controlled by the first corner. Thereby, the arc can be easily extended toward the outside of the first fixed terminal.
 第2固定端子は、第2固定端子の外側へ向かう第2角部を含んでもよい。この場合、第2角部により、第2固定端子からアークが延びる方向を制御することができる。それにより、アークを第2固定端子の外側へ向けて容易に引き延ばすことができる。 The second fixed terminal may include a second corner facing outward of the second fixed terminal. In this case, the direction in which the arc extends from the second fixed terminal can be controlled by the second corner. Thereby, the arc can be easily extended toward the outside of the second fixed terminal.
 内側磁石は、第1表面と第2表面とを含んでもよい。第2表面は、第1表面よりも第1固定接点及び第2固定接点に近くてもよい。内側磁石のうち少なくとも第2表面は。絶縁材で覆われていてもよい。この場合、内側磁石が絶縁材によってアークから保護される。 The inner magnet may include a first surface and a second surface. The second surface may be closer to the first stationary contact and the second stationary contact than the first surface. At least a second surface of the inner magnet. It may be covered with an insulating material. In this case, the inner magnet is protected from arcing by the insulation.
 内側磁石は、中間部分と、第1部分と、第2部分とを含んでもよい。中間部分は、第2方向から見て、第1固定端子と第2固定端子との間に位置してもよい。第1部分は、第2方向から見て、第1固定端子と重なってもよい。第2部分は。第2方向から見て、第2固定端子と重なってもよい。この場合、内側磁石からの磁界によってアークが引き延ばされる範囲が拡大される。 The inner magnet may include an intermediate portion, a first portion, and a second portion. The intermediate portion may be positioned between the first fixed terminal and the second fixed terminal when viewed from the second direction. The first portion may overlap the first fixed terminal when viewed from the second direction. Second part. It may overlap with the second fixed terminal when viewed from the second direction. In this case, the range over which the arc is extended by the magnetic field from the inner magnet is increased.
 本発明によれば、電磁継電器において、固定端子間においてアークが短絡することによる遮断性能の低下を抑えることができる。 According to the present invention, in an electromagnetic relay, it is possible to suppress deterioration in breaking performance due to arc short-circuiting between fixed terminals.
開状態の電磁継電器の断面図である。FIG. 4 is a cross-sectional view of an electromagnetic relay in an open state; 閉状態の電磁継電器の断面図である。FIG. 4 is a cross-sectional view of the electromagnetic relay in a closed state; 接点装置の拡大図である。It is an enlarged view of a contact device. 図1におけるIV-IV断面図である。FIG. 2 is a sectional view along IV-IV in FIG. 1; 第1変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 1st modification. 第2変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 2nd modification. 第3変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 3rd modification. 第4変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 4th modification. 第5変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 5th modification. 第6変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 6th modification. 第7変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 7th modification. 第8変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on an 8th modification. 第9変形例に係る電磁継電器を示す図である。FIG. 21 is a diagram showing an electromagnetic relay according to a ninth modification; 第10変形例に係る電磁継電器を示す図である。FIG. 20 is a diagram showing an electromagnetic relay according to a tenth modification; 第11変形例に係る電磁継電器を示す図である。FIG. 21 is a diagram showing an electromagnetic relay according to an eleventh modified example; 第11変形例に係る第1固定端子を示す図である。It is a figure showing the 1st fixed terminal concerning the 11th modification. 第11変形例に係る第1固定端子の他の例を示す図である。It is a figure showing other examples of the 1st fixed terminal concerning the 11th modification. 第12変形例に係る電磁継電器を示す図である。FIG. 21 is a diagram showing an electromagnetic relay according to a twelfth modification; 第12変形例に係る第1固定端子を示す図である。It is a figure showing the 1st fixed terminal concerning the 12th modification.
 以下、本発明の実施形態に係る電磁継電器について、図面を参照して説明する。図1は、実施形態に係る電磁継電器1の断面図である。図1に示すように、電磁継電器1は、ケース2と、接点装置3と、駆動装置4とを備えている。ケース2は、樹脂、或いはセラミックなどの絶縁材で形成されている。ケース2内には、接点装置3が収容されている。 An electromagnetic relay according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an electromagnetic relay 1 according to an embodiment. As shown in FIG. 1, the electromagnetic relay 1 includes a case 2, a contact device 3, and a drive device 4. As shown in FIG. The case 2 is made of an insulating material such as resin or ceramic. A contact device 3 is accommodated in the case 2 .
 接点装置3は、第1固定端子6と、第2固定端子7と、可動接触片8と、可動機構9と、第1固定接点10と、第2固定接点11と、第1可動接点12と、第2可動接点13とを含む。 The contact device 3 includes a first fixed terminal 6, a second fixed terminal 7, a movable contact piece 8, a movable mechanism 9, a first fixed contact 10, a second fixed contact 11, and a first movable contact 12. , and the second movable contact 13 .
 なお、以下の説明において、可動接触片8が延びる方向が、第1方向(X1,X2)と定義される。第1方向(X1,X2)は、第1長手方向(X1)と第2長手方向(X2)とを含む。第2長手方向(X2)は、第1長手方向(X1)と反対の方向である。第2固定接点11から第1固定接点10へ向かう方向が第1長手方向(X1)と定義される。第1固定接点10から第2固定接点11へ向かう方向が第2長手方向(X2)と定義される。 In the following description, the direction in which the movable contact piece 8 extends is defined as the first direction (X1, X2). The first directions (X1, X2) include a first longitudinal direction (X1) and a second longitudinal direction (X2). The second longitudinal direction (X2) is opposite to the first longitudinal direction (X1). A direction from the second fixed contact 11 to the first fixed contact 10 is defined as a first longitudinal direction (X1). A direction from the first fixed contact 10 to the second fixed contact 11 is defined as a second longitudinal direction (X2).
 第1固定接点10と第1可動接点12とが互いに向かい合う方向が、第2方向(Z1,Z2)と定義される。第2方向(Z1,Z2)は、上方(Z1)と下方(Z2)とを含む。第1可動接点12から第1固定接点10に向かう方向が上方(Z1)と定義される。第1固定接点10から第1可動接点12に向かう方向が下方(Z2)と定義される。 The direction in which the first fixed contact 10 and the first movable contact 12 face each other is defined as the second direction (Z1, Z2). The second directions (Z1, Z2) include upward (Z1) and downward (Z2). The direction from the first movable contact 12 to the first fixed contact 10 is defined as upward (Z1). A direction from the first fixed contact 10 to the first movable contact 12 is defined as downward (Z2).
 第1固定端子6と、第2固定端子7と、可動接触片8と、第1固定接点10と、第2固定接点11と、第1可動接点12と、第2可動接点13とは、導電性を有する材料で形成されている。例えば、第1固定端子6と、第2固定端子7と、可動接触片8とは、リン青銅、ベリリウム銅、黄銅、或いはタフピッチ銅などの端子材として公知の金属材料製である。ただし、第1固定端子6と、第2固定端子7と、可動接触片8とは、これらと異なる材料製であってもよい。第1固定接点10と、第2固定接点11と、第1可動接点12と、第2可動接点13とは、銅系金属、或いは銀系金属などの接点材として公知の金属材料製である。 The first fixed terminal 6, the second fixed terminal 7, the movable contact piece 8, the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are electrically conductive. It is made of a material that is flexible. For example, the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 are made of metal materials known as terminal materials such as phosphor bronze, beryllium copper, brass, or tough pitch copper. However, the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 may be made of materials different from these materials. The first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are made of metal known as a contact material such as copper-based metal or silver-based metal.
 第1固定端子6と第2固定端子7とは、第2方向(Z1,Z2)に延びている。第1固定端子6と第2固定端子7とは、例えば、円筒状の形状を有している。第1固定端子6と第2固定端子7とは、第1方向(X1,X2)に互いに間隔を隔てて配置されている。第1固定端子6には、第1固定接点10が接続されている。第2固定端子7には、第2固定接点11が接続されている。第1固定接点10と第2固定接点11とは、ケース2内に配置されている。 The first fixed terminal 6 and the second fixed terminal 7 extend in the second direction (Z1, Z2). The first fixed terminal 6 and the second fixed terminal 7 have, for example, a cylindrical shape. The first fixed terminal 6 and the second fixed terminal 7 are spaced apart from each other in the first direction (X1, X2). A first fixed contact 10 is connected to the first fixed terminal 6 . A second fixed contact 11 is connected to the second fixed terminal 7 . The first fixed contact 10 and the second fixed contact 11 are arranged inside the case 2 .
 可動接触片8と第1可動接点12と第2可動接点13とは、ケース2内に配置されている。第1可動接点12と第2可動接点13とは、可動接触片8に接続されている。第1可動接点12は、第1固定接点10に向かい合っている。第1可動接点12は、第1固定接点10に接触及び開離可能である。第2可動接点13は、第2固定接点11に向かい合っている。第2可動接点13は、第2固定接点11に接触及び開離可能である。第1可動接点12は、第2可動接点13と第1方向(X1,X2)に間隔を隔てて配置されている。 The movable contact piece 8 , the first movable contact 12 and the second movable contact 13 are arranged inside the case 2 . The first movable contact 12 and the second movable contact 13 are connected to the movable contact piece 8 . The first movable contact 12 faces the first fixed contact 10 . The first movable contact 12 can be brought into contact with and separated from the first fixed contact 10 . The second movable contact 13 faces the second fixed contact 11 . The second movable contact 13 can be brought into contact with and separated from the second fixed contact 11 . The first movable contact 12 is spaced apart from the second movable contact 13 in the first direction (X1, X2).
 可動接触片8は、第2方向(Z1,Z2)に移動可能である。可動接触片8は、図1に示す開位置と、図2に示す閉位置とに移動可能である。図1に示すように、可動接触片8が開位置で、可動接点12,13は、固定接点10,11から離れている。図2に示すように、可動接触片8が閉位置で、可動接点12,13は、固定接点10,11に接触している。以下、可動接点12,13が、固定接点10,11に近づく方向が接触方向と定義される。可動接点12,13が、固定接点10,11から離れる方向が開離方向と定義される。 The movable contact piece 8 is movable in the second direction (Z1, Z2). The movable contact piece 8 is movable between an open position shown in FIG. 1 and a closed position shown in FIG. As shown in FIG. 1, the movable contact piece 8 is in the open position and the movable contacts 12,13 are separated from the fixed contacts 10,11. As shown in FIG. 2, when the movable contact piece 8 is in the closed position, the movable contacts 12 and 13 are in contact with the fixed contacts 10 and 11 . Hereinafter, the direction in which the movable contacts 12 and 13 approach the fixed contacts 10 and 11 is defined as the contact direction. A direction in which the movable contacts 12 and 13 separate from the fixed contacts 10 and 11 is defined as a separation direction.
 可動機構9は、可動接触片8を支持する。可動機構9は、駆動軸15と接点バネ16とを含む。駆動軸15は、可動接触片8に連結される。駆動軸15は、第2方向(Z1,Z2)に延びており、可動接触片8を第2方向(Z1,Z2)に貫通している。駆動軸15は、第2方向(Z1,Z2)に移動可能に設けられる。接点バネ16は、可動接触片8を接触方向へ向けて付勢する。 The movable mechanism 9 supports the movable contact piece 8. The movable mechanism 9 includes a drive shaft 15 and contact springs 16 . A drive shaft 15 is connected to the movable contact piece 8 . The drive shaft 15 extends in the second direction (Z1, Z2) and passes through the movable contact piece 8 in the second direction (Z1, Z2). The drive shaft 15 is provided movably in the second directions (Z1, Z2). The contact spring 16 biases the movable contact piece 8 in the contact direction.
 駆動装置4は、コイル21と、スプール22と、可動鉄心23と、固定鉄心24と、ヨーク25と、復帰バネ26とを含む。駆動装置4は、電磁力によって、可動機構9を介して、可動接触片8を開位置と閉位置とに移動させる。コイル21は、スプール22に巻回されている。可動鉄心23と、固定鉄心24とは、スプール22内に配置されている。可動鉄心23は、駆動軸15に接続されている。可動鉄心23は、第2方向(Z1,Z2)に移動可能である。固定鉄心24は、可動鉄心23と向かい合って配置されている。復帰バネ26は、可動鉄心23を開離方向に付勢している。 The drive device 4 includes a coil 21, a spool 22, a movable iron core 23, a fixed iron core 24, a yoke 25, and a return spring 26. The driving device 4 uses electromagnetic force to move the movable contact piece 8 between the open position and the closed position via the movable mechanism 9 . Coil 21 is wound around spool 22 . The movable core 23 and the fixed core 24 are arranged inside the spool 22 . The movable iron core 23 is connected to the drive shaft 15 . The movable core 23 is movable in the second directions (Z1, Z2). The fixed core 24 is arranged to face the movable core 23 . The return spring 26 biases the movable iron core 23 in the opening direction.
 電磁継電器1では、コイル21が通電されると、コイル21から発生する磁界による磁力によって、可動鉄心23が固定鉄心24に吸引される。それにより、可動鉄心23と駆動軸15とが、復帰バネ26の付勢力に抗して、接触方向に移動する。それにより、可動接触片8が、図2に示す閉位置へ移動し、可動接点12,13が固定接点10,11に接触する。なお、可動接点12,13が固定接点10,11に接触した後、駆動軸15がさらに接触方向へ移動することによって、接点バネ16が圧縮される。 In the electromagnetic relay 1 , when the coil 21 is energized, the magnetic force generated by the magnetic field generated by the coil 21 attracts the movable core 23 to the fixed core 24 . Thereby, the movable iron core 23 and the drive shaft 15 move in the contact direction against the biasing force of the return spring 26 . Thereby, the movable contact piece 8 moves to the closed position shown in FIG. After the movable contacts 12 and 13 contact the fixed contacts 10 and 11, the contact spring 16 is compressed by further movement of the drive shaft 15 in the contact direction.
 コイル21への通電がオフにされると、可動鉄心23と駆動軸15とが、復帰バネ26の付勢力によって、開離方向へ移動する。それにより、可動接触片8が図1に示す開位置へ移動し、可動接点12,13が固定接点10,11から離れる。 When the coil 21 is de-energized, the movable iron core 23 and the drive shaft 15 are moved in the separating direction by the biasing force of the return spring 26 . As a result, the movable contact piece 8 moves to the open position shown in FIG.
 電磁継電器1は、外側磁石41,42を備えている。外側磁石41,42は、第1固定接点10と第1可動接点12との間と、第2固定接点11と第2可動接点13との間とで発生するアークを引き延ばすための磁界を発生させる。外側磁石41,42は、第1方向(X1,X2)において、第1固定端子6と第2固定端子7との外側に配置される。 The electromagnetic relay 1 has outer magnets 41 and 42 . The outer magnets 41 and 42 generate a magnetic field for extending arcs generated between the first fixed contact 10 and the first movable contact 12 and between the second fixed contact 11 and the second movable contact 13. . The outer magnets 41, 42 are arranged outside the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2).
 外側磁石41,42は、第1外側磁石41と第2外側磁石42とを含む。第1外側磁石41と第2外側磁石42とは、永久磁石である。第1外側磁石41と第2外側磁石42とは、ケース2の周囲に配置される。ただし、第1外側磁石41と第2外側磁石42とは、ケース2内に配置されてもよい。第1外側磁石41は、第1固定端子6に対して第1長手方向(X1)に配置されている。第2外側磁石42は、第2固定端子7に対して第2長手方向(X2)に配置されている。 The outer magnets 41 and 42 include a first outer magnet 41 and a second outer magnet 42. The first outer magnet 41 and the second outer magnet 42 are permanent magnets. The first outer magnet 41 and the second outer magnet 42 are arranged around the case 2 . However, the first outer magnet 41 and the second outer magnet 42 may be arranged inside the case 2 . The first outer magnet 41 is arranged in the first longitudinal direction (X1) with respect to the first fixed terminal 6 . The second outer magnet 42 is arranged in the second longitudinal direction (X2) with respect to the second fixed terminal 7 .
 図3は、接点装置3の拡大図である。図4は、図1におけるIV-IV断面図である。以下、第1方向(X1,X2)及び第2方向(Z1,Z2)に垂直な方向が、第3方向(Y1,Y2)と定義される。また、第3方向(Y1,Y2)のうちの一方が、第1横方向(Y1)と定義され、第1横方向(Y1)と反対の方向が第2横方向(Y2)と定義される。 FIG. 3 is an enlarged view of the contact device 3. FIG. FIG. 4 is a sectional view along IV-IV in FIG. Hereinafter, a direction perpendicular to the first directions (X1, X2) and the second directions (Z1, Z2) is defined as a third direction (Y1, Y2). Also, one of the third directions (Y1, Y2) is defined as a first lateral direction (Y1), and the direction opposite to the first lateral direction (Y1) is defined as a second lateral direction (Y2). .
 第1外側磁石41と第2外側磁石42とは、ケース2内に磁界を発生させる。図3および図4において二点鎖線で示される矢印A1は、第1外側磁石41及び第2外側磁石42によって生じる磁界を示している。第1外側磁石41と第2外側磁石42とは、互いに異なる極が向かい合って配置されている。例えば、第1外側磁石41のN極が、第2外側磁石42のS極と向かい合っている。 The first outer magnet 41 and the second outer magnet 42 generate a magnetic field inside the case 2 . An arrow A1 indicated by a two-dot chain line in FIGS. 3 and 4 indicates the magnetic field generated by the first outer magnet 41 and the second outer magnet 42. As shown in FIG. The first outer magnet 41 and the second outer magnet 42 are arranged with different poles facing each other. For example, the north pole of the first outer magnet 41 faces the south pole of the second outer magnet 42 .
 電流が第1固定端子6から可動接触片8を通り第2固定端子7へ流れる場合、図4に示すように、第1外側磁石41からの磁界によって、第1固定接点10と第1可動接点12とに生じるアークに、第1ローレンツ力F1が作用する。第1ローレンツ力F1は、第1横方向(Y1)に作用する。それにより、アークが、第1ローレンツ力F1の方向に引き延ばされる。また、第2外側磁石42からの磁界によって、第2固定接点11と第2可動接点13とに生じるアークに、第2ローレンツ力F2が作用する。第2ローレンツ力F2は、第2横方向(Y2)に作用する。それにより、アークが、第2ローレンツ力F2の方向に引き延ばされる。 When current flows from the first fixed terminal 6 through the movable contact piece 8 to the second fixed terminal 7, as shown in FIG. A first Lorentz force F1 acts on the arc generated at 12 and 12 . The first Lorentz force F1 acts in the first lateral direction (Y1). The arc is thereby elongated in the direction of the first Lorentz force F1. Also, the second Lorentz force F2 acts on the arc generated between the second fixed contact 11 and the second movable contact 13 by the magnetic field from the second outer magnet 42 . The second Lorentz force F2 acts in the second lateral direction (Y2). The arc is thereby elongated in the direction of the second Lorentz force F2.
 電流が上記とは逆に、第2固定端子7から可動接触片8を通り第1固定端子6へ流れる場合、第1外側磁石41からの磁界によって、第1固定接点10と第1可動接点12とに生じるアークに、第1ローレンツ力F1’が作用する。第1ローレンツ力F1’は、第2横方向(Y2)に作用する。それにより、アークが、第1ローレンツ力F1’の方向に引き延ばされる。また、第2外側磁石42からの磁界によって、第2固定接点11と第2可動接点13とに生じるアークに、第2ローレンツ力F2’が作用する。第2ローレンツ力F2’は、第1横方向(Y1)に作用する。それにより、アークが、第2ローレンツ力F2’の方向に引き延ばされる。 Contrary to the above, when the current flows from the second fixed terminal 7 through the movable contact piece 8 to the first fixed terminal 6, the magnetic field from the first outer magnet 41 causes the first fixed contact 10 and the first movable contact 12 to move. A first Lorentz force F1' acts on the arc generated at and. The first Lorentz force F1' acts in the second lateral direction (Y2). The arc is thereby elongated in the direction of the first Lorentz force F1'. A second Lorentz force F<b>2 ′ acts on the arc generated between the second fixed contact 11 and the second movable contact 13 by the magnetic field from the second outer magnet 42 . The second Lorentz force F2' acts in the first lateral direction (Y1). The arc is thereby elongated in the direction of the second Lorentz force F2'.
 電磁継電器1は、内側磁石43を備えている。内側磁石43は、第1固定端子6と第2固定端子7との間で短絡したアークAC1を、第3方向(Y1,Y2)へ引き延ばすための磁界を発生させる。図3において矢印A2は、内側磁石43によって生じる磁界を示している。内側磁石43は、例えばN極が下方(Z2)を向くように配置される。 The electromagnetic relay 1 has an inner magnet 43 . The inner magnet 43 generates a magnetic field for extending the short-circuited arc AC1 between the first fixed terminal 6 and the second fixed terminal 7 in the third direction (Y1, Y2). Arrow A2 in FIG. 3 indicates the magnetic field generated by the inner magnet 43 . The inner magnet 43 is arranged, for example, so that the N pole faces downward (Z2).
 図4に示すように、内側磁石43は、少なくとも一部が、第1方向(X1,X2)において第1固定端子6と第2固定端子7との間に配置される。内側磁石43は、ケース2内に配置されている。すなわち、内側磁石43は、アークを消弧するためのケース2内の遮断空間に配置されている。内側磁石43は、第1固定接点10及び第2固定接点11よりも上方(Z1)に配置される。 As shown in FIG. 4, at least a portion of the inner magnet 43 is arranged between the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2). The inner magnet 43 is arranged inside the case 2 . That is, the inner magnet 43 is arranged in the shielding space inside the case 2 for extinguishing the arc. The inner magnet 43 is arranged above (Z1) the first fixed contact 10 and the second fixed contact 11 .
 電流が第1固定端子6から可動接触片8を通り第2固定端子7へ流れる場合、短絡したアークAC1に、第3ローレンツ力F3が作用する。第3ローレンツ力F3は、第2横方向(Y2)に作用する。それにより、短絡したアークAC1が、第3ローレンツ力F3の方向に引き延ばされる。 When current flows from the first fixed terminal 6 through the movable contact piece 8 to the second fixed terminal 7, a third Lorentz force F3 acts on the short-circuited arc AC1. The third Lorentz force F3 acts in the second lateral direction (Y2). As a result, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3.
 上記とは逆に、電流が第2固定端子7から可動接触片8を通り第1固定端子6へ流れる場合、短絡したアークAC1に、第3ローレンツ力F3’が作用する。第3ローレンツ力F3’は、第1横方向(Y1)に作用する。それにより、短絡したアークAC1が、第3ローレンツ力F3’の方向に引き延ばされる。 Contrary to the above, when current flows from the second fixed terminal 7 through the movable contact piece 8 to the first fixed terminal 6, a third Lorentz force F3' acts on the short-circuited arc AC1. The third Lorentz force F3' acts in the first lateral direction (Y1). Thereby, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3'.
 以上説明した本実施形態に係る電磁継電器1では、外側磁石41,42から生じる磁界によってアークが引き延ばされる。それにより、アークが迅速に消弧される。また、アークが第1固定端子6と第2固定端子7との間で短絡しても、内側磁石43から生じる磁界によって、アークが第3方向(Y1,Y2)へ引き延ばされる。それにより、アークが第1固定端子6と第2固定端子7との間で短絡しても、アークを迅速に消弧することができる。それにより、電磁継電器1の遮断性能の低下が抑えられる。 In the electromagnetic relay 1 according to this embodiment described above, the arc is extended by the magnetic fields generated by the outer magnets 41 and 42 . The arc is thereby quickly extinguished. Even if the arc short-circuits between the first fixed terminal 6 and the second fixed terminal 7, the magnetic field generated by the inner magnet 43 extends the arc in the third direction (Y1, Y2). Thereby, even if an arc short-circuits between the first fixed terminal 6 and the second fixed terminal 7, the arc can be quickly extinguished. As a result, deterioration in the breaking performance of the electromagnetic relay 1 is suppressed.
 以上、本発明の一実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。 Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention.
 駆動装置4の構造は、上記の実施形態のものに限らず変更されてもよい。例えば、上記の実施形態では、駆動装置4は、接点装置3の下方(Z2)に配置されている。しかし、駆動装置4は、接点装置3に対して、第1方向(X1,X2)、或いは第3方向(Y1,Y2)に配置されておよい。上記の実施形態では、接触方向は上方(Z1)であり、開離方向は下方(Z2)である。しかし、接触方向は下方(Z2)であり、開離方向は上方(Z1)であってもよい。 The structure of the driving device 4 is not limited to that of the above embodiment, and may be modified. For example, in the above embodiment, the drive device 4 is arranged below the contact device 3 (Z2). However, the drive device 4 may be arranged in the first direction (X1, X2) or in the third direction (Y1, Y2) with respect to the contact device 3 . In the above embodiment, the contact direction is upward (Z1) and the release direction is downward (Z2). However, the contact direction may be downward (Z2) and the release direction upward (Z1).
 接点装置3の構造は、上記の実施形態のものに限らず変更されてもよい。例えば、固定接点と可動接点との数は2つに限らず、2つより多くてもよい。第1固定接点10は、第1固定端子6と別体であってもよく、或いは一体であってもよい。第2固定接点11は、第2固定端子7と別体であってもよく、或いは一体であってもよい。第1可動接点12は、可動接触片8と別体であってもよく、或いは一体であってもよい。第2可動接点13は、可動接触片8と別体であってもよく、或いは一体であってもよい。 The structure of the contact device 3 is not limited to that of the above embodiment, and may be modified. For example, the number of fixed contacts and movable contacts is not limited to two, and may be more than two. The first fixed contact 10 may be separate from or integrated with the first fixed terminal 6 . The second fixed contact 11 may be separate from or integral with the second fixed terminal 7 . The first movable contact 12 may be separate from or integral with the movable contact piece 8 . The second movable contact 13 may be separate from or integral with the movable contact piece 8 .
 磁石の配置は、上記の実施形態のものに限らず、変更されてもよい。例えば、第1外側磁石41と第2外側磁石42とは、同じ極同士が向かい合うように配置されてもよい。例えば、第1外側磁石41のS極と第2外側磁石42のS極とが、互いに向かい合うように配置されてもよい。 The arrangement of the magnets is not limited to that of the above embodiment, and may be changed. For example, the first outer magnet 41 and the second outer magnet 42 may be arranged such that the same poles face each other. For example, the S pole of the first outer magnet 41 and the S pole of the second outer magnet 42 may be arranged to face each other.
 図5は、第1変形例に係る電磁継電器1を示す図である。図5に示すように、第1外側磁石41と第2外側磁石42とは、第3方向(Y1,Y2)に互いに向かい合って配置されてもよい。図5において、矢印A3,A4は、第1外側磁石41と第2外側磁石42とによって生じる磁界を示している。第1外側磁石41と第2外側磁石42とは、互いに異なる極が向かい合って配置されてもよい。例えば、第1外側磁石41のN極が、第2外側磁石42のS極と向かい合ってもよい。 FIG. 5 is a diagram showing an electromagnetic relay 1 according to a first modified example. As shown in FIG. 5, the first outer magnet 41 and the second outer magnet 42 may be arranged facing each other in the third direction (Y1, Y2). In FIG. 5, arrows A3 and A4 indicate magnetic fields generated by the first outer magnet 41 and the second outer magnet . The first outer magnet 41 and the second outer magnet 42 may be arranged with different poles facing each other. For example, the north pole of the first outer magnet 41 may face the south pole of the second outer magnet 42 .
 この場合、電流が第1固定端子6から可動接触片8を通り第2固定端子7へ流れると、第1固定接点10と第1可動接点12とに生じるアークに、第1ローレンツ力F1が作用する。第1ローレンツ力F1は、第2長手方向(X2)に作用する。それにより、アークが、第1ローレンツ力F1の方向に引き延ばされる。第2固定接点11と第2可動接点13とに生じるアークに、第2ローレンツ力F2が作用する。第2ローレンツ力F2は、第1長手方向(X1)に作用する。それにより、アークが、第2ローレンツ力F2の方向に引き延ばされる。また、短絡したアークAC1に、第3ローレンツ力F3が作用する。第3ローレンツ力F3は、第2横方向(Y2)に作用する。それにより、短絡したアークAC1が、第3ローレンツ力F3の方向に引き延ばされる。 In this case, when a current flows from the first fixed terminal 6 through the movable contact piece 8 to the second fixed terminal 7, a first Lorentz force F1 acts on the arc generated between the first fixed contact 10 and the first movable contact 12. do. The first Lorentz force F1 acts in the second longitudinal direction (X2). The arc is thereby elongated in the direction of the first Lorentz force F1. A second Lorentz force F2 acts on the arc generated between the second fixed contact 11 and the second movable contact 13 . The second Lorentz force F2 acts in the first longitudinal direction (X1). The arc is thereby elongated in the direction of the second Lorentz force F2. A third Lorentz force F3 acts on the short-circuited arc AC1. The third Lorentz force F3 acts in the second lateral direction (Y2). As a result, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3.
 電流が上記とは逆に、第2固定端子7から可動接触片8を通り第1固定端子6へ流れる場合、第1固定接点10と第1可動接点12とに生じるアークに、第1ローレンツ力F1’が作用する。第1ローレンツ力F1’は、第1長手方向(X1)に作用する。それにより、アークが、第1ローレンツ力F1’の方向に引き延ばされる。第2固定接点11と第2可動接点13とに生じるアークに、第2ローレンツ力F2’が作用する。第2ローレンツ力F2’は、第2長手方向(X2)に作用する。それにより、アークが、第2ローレンツ力F2’の方向に引き延ばされる。また、短絡したアークAC1に、第3ローレンツ力F3’が作用する。第3ローレンツ力F3’は、第1横方向(Y1)に作用する。それにより、短絡したアークAC1が、第3ローレンツ力F3’の方向に引き延ばされる。 Contrary to the above, when the current flows from the second fixed terminal 7 through the movable contact piece 8 to the first fixed terminal 6, the arc generated between the first fixed contact 10 and the first movable contact 12 causes the first Lorentz force F1' acts. The first Lorentz force F1' acts in the first longitudinal direction (X1). The arc is thereby elongated in the direction of the first Lorentz force F1'. A second Lorentz force F<b>2 ′ acts on the arc generated between the second fixed contact 11 and the second movable contact 13 . The second Lorentz force F2' acts in the second longitudinal direction (X2). The arc is thereby elongated in the direction of the second Lorentz force F2'. A third Lorentz force F3' acts on the short-circuited arc AC1. The third Lorentz force F3' acts in the first lateral direction (Y1). Thereby, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3'.
 なお、第1外側磁石41と第2外側磁石42とは、同じ極同士が向かい合って配置されてもよい。上述した実施形態の第1外側磁石41と第2外側磁石42の配置と、第1実施形態の第1外側磁石41と第2外側磁石42とが組み合わされてもよい。すなわち、ケース2の第1長手方向(X1)と第2長手方向(X2)と第1横方向(Y1)と第2横方向(Y2)とのそれぞれに、外側磁石41,42が配置されてもよい。 The first outer magnet 41 and the second outer magnet 42 may be arranged with the same poles facing each other. The arrangement of the first outer magnets 41 and the second outer magnets 42 of the above embodiment and the first outer magnets 41 and the second outer magnets 42 of the first embodiment may be combined. That is, the outer magnets 41 and 42 are arranged in the first longitudinal direction (X1), the second longitudinal direction (X2), the first lateral direction (Y1), and the second lateral direction (Y2) of the case 2, respectively. good too.
 図6は、第2変形例に係る電磁継電器1を示す図である。図6に示すように、電磁継電器1は、第1突出部44と第2突出部45とを備えてもよい。第1突出部44と第2突出部45とは、第2方向(Z1,Z2)から見て、外側磁石41,42に対して第3方向(Y1,Y2)に配置されてもよい。第1突出部44と第2突出部45とは、第1固定接点10と第2固定接点11との間に向かって延びていてもよい。 FIG. 6 is a diagram showing an electromagnetic relay 1 according to a second modified example. As shown in FIG. 6 , the electromagnetic relay 1 may include a first projecting portion 44 and a second projecting portion 45 . The first projecting portion 44 and the second projecting portion 45 may be arranged in the third direction (Y1, Y2) with respect to the outer magnets 41, 42 when viewed from the second direction (Z1, Z2). The first protrusion 44 and the second protrusion 45 may extend between the first fixed contact 10 and the second fixed contact 11 .
 詳細には、第1突出部44は、外側磁石41,42に対して第1横方向(Y1)に配置されてもよい。第2突出部45は、第3方向(Y1,Y2)において第1突出部44と反対側に配置されてもよい。すなわち、第2突出部45は、外側磁石41,42に対して第2横方向(Y2)に配置されてもよい。第1、第2突出部44,45は、内側磁石43に向かって延びていてもよい。 Specifically, the first projecting portion 44 may be arranged in the first lateral direction (Y1) with respect to the outer magnets 41 and 42 . The second protrusion 45 may be arranged on the side opposite to the first protrusion 44 in the third direction (Y1, Y2). That is, the second protrusion 45 may be arranged in the second lateral direction (Y2) with respect to the outer magnets 41,42. The first and second protrusions 44 and 45 may extend toward the inner magnet 43 .
 第1、第2突出部44,45は、内側磁石43に向かって先細りの形状を有してもよい。第1突出部44は、第2横方向(Y2)に向かって先細りの形状を有してもよい。第2突出部45は、第1横方向(Y1)に向かって先細りの形状を有してもよい。第1、第2突出部44,45は、樹脂、或いはセラミックなどの絶縁材製であってもよい。この場合、内側磁石43によって第3方向(Y1,Y2)に引き延ばされるアークAC1が、第1、第2突出部44,45によって第1方向(X1,X2)に広げられる。それにより、アークAC1が迅速に消弧される。 The first and second protrusions 44 and 45 may have a tapered shape toward the inner magnet 43 . The first protrusion 44 may have a tapered shape in the second horizontal direction (Y2). The second protrusion 45 may have a tapered shape in the first lateral direction (Y1). The first and second protrusions 44 and 45 may be made of an insulating material such as resin or ceramic. In this case, the arc AC1 extended in the third direction (Y1, Y2) by the inner magnet 43 is spread in the first direction (X1, X2) by the first and second projections 44, 45. FIG. Arc AC1 is thereby quickly extinguished.
 図7は、第3変形例に係る電磁継電器1を示す図である。図7に示すように、電磁継電器1は、複数の第1突出部44A,44Bと複数の第2突出部45A,45Bとを備えてもよい。 FIG. 7 is a diagram showing an electromagnetic relay 1 according to a third modified example. As shown in FIG. 7, the electromagnetic relay 1 may include a plurality of first protrusions 44A, 44B and a plurality of second protrusions 45A, 45B.
 突出部の形状は、上記の実施形態のような先細りの形状に限らず、他の形状であってもよい。図8は、第4変形例に係る電磁継電器1を示す図である。図8に示すように、突出部44,45は、直線状の形状であってもよい。 The shape of the projecting portion is not limited to the tapered shape as in the above embodiment, and may be another shape. FIG. 8 is a diagram showing an electromagnetic relay 1 according to a fourth modification. As shown in FIG. 8, the projections 44, 45 may have a linear shape.
 固定端子6,7の形状は、上記の実施形態のような円筒形に限らず、他の形状であってもよい。図9は、第5変形例に係る電磁継電器1を示す図である。図9に示すように、固定端子6,7は、四角柱状であってもよい。第1固定端子6は、第2方向(Z1,Z2)から見て、第1固定端子6の外側へ向かう第1角部6A,6Bを含んでもよい。第2固定端子7は、第2方向(Z1,Z2)から見て、第2固定端子7の外側へ向かう第2角部7A,7Bを含んでもよい。 The shape of the fixed terminals 6 and 7 is not limited to the cylindrical shape as in the above embodiment, and may be other shapes. FIG. 9 is a diagram showing an electromagnetic relay 1 according to a fifth modification. As shown in FIG. 9, the fixed terminals 6 and 7 may have a square prism shape. The first fixed terminal 6 may include first corners 6A, 6B facing outward of the first fixed terminal 6 when viewed from the second direction (Z1, Z2). The second fixed terminal 7 may include second corners 7A and 7B extending outward of the second fixed terminal 7 when viewed in the second direction (Z1, Z2).
 第1角部6Aは、第2長手方向(X2)且つ第1横方向(Y1)を向いていてもよい。第1角部6Bは、第2長手方向(X2)且つ第2横方向(Y2)を向いていてもよい。第2角部7Aは、第1長手方向(X1)且つ第1横方向(Y1)を向いていてもよい。第2角部7Bは、第1長手方向(X1)且つ第2横方向(Y2)を向いていてもよい。この場合、アークを引き延ばす方向を角部6A,6B,7A,7Bが向かう方向へ制御することができる。 The first corner 6A may face the second longitudinal direction (X2) and the first lateral direction (Y1). The first corner 6B may face the second longitudinal direction (X2) and the second lateral direction (Y2). The second corner portion 7A may face the first longitudinal direction (X1) and the first lateral direction (Y1). The second corner 7B may face the first longitudinal direction (X1) and the second lateral direction (Y2). In this case, the direction in which the arc is extended can be controlled in the direction in which the corners 6A, 6B, 7A, and 7B are directed.
 図10は、第6変形例に係る電磁継電器1を示す図である。図10に示すように、第1角部6A,6Bと第2角部7A,7Bとは、第3方向(Y1,Y2)を向いていてもよい。第1角部6Aと第2角部7Aとは、第1横方向(Y1)を向いていてもよい。第1角部6Bと第2角部7Bとは、第2横方向(Y2)を向いていてもよい。 FIG. 10 is a diagram showing an electromagnetic relay 1 according to a sixth modification. As shown in FIG. 10, the first corners 6A, 6B and the second corners 7A, 7B may face the third direction (Y1, Y2). The first corner 6A and the second corner 7A may face the first horizontal direction (Y1). The first corner 6B and the second corner 7B may face the second horizontal direction (Y2).
 固定端子6,7は、四角柱状に限らず、他の形状であってもよい。図11は、第7変形例に係る電磁継電器1を示す図である。図11に示すように、固定端子6,7は、三角柱状であってもよい。或いは、固定端子6,7は、三角柱以外の形状であってもよい。 The fixed terminals 6 and 7 are not limited to having a square prism shape, and may have other shapes. FIG. 11 is a diagram showing an electromagnetic relay 1 according to a seventh modification. As shown in FIG. 11, the fixed terminals 6 and 7 may have a triangular prism shape. Alternatively, the fixed terminals 6 and 7 may have a shape other than a triangular prism.
 内側磁石43の形状、或いは配置は、上記の実施形態のものに限らず、変更されてもよい。上記の実施形態では、内側磁石43は、ケース2内の遮断空間に配置されている。しかし、内側磁石43は、遮断空間の外側に配置されてもよい。図12は、第8変形例に係る電磁継電器1を示す図である。図12に示すように、内側磁石43は、ケース2の外部に配置されてもよい。 The shape or arrangement of the inner magnets 43 is not limited to those in the above embodiment, and may be changed. In the above embodiments, the inner magnets 43 are arranged in the shielded space inside the case 2 . However, the inner magnet 43 may be arranged outside the shielded space. FIG. 12 is a diagram showing an electromagnetic relay 1 according to an eighth modification. As shown in FIG. 12, the inner magnet 43 may be arranged outside the case 2 .
 図13は、第9変形例に係る電磁継電器1を示す図である。図13に示すように、内側磁石43は、樹脂、或いはセラミックなどの絶縁材46で覆われてもよい。例えば、内側磁石43の全体が、絶縁材46で覆われてもよい。 FIG. 13 is a diagram showing an electromagnetic relay 1 according to a ninth modification. As shown in FIG. 13, the inner magnet 43 may be covered with an insulating material 46 such as resin or ceramic. For example, the entire inner magnet 43 may be covered with insulating material 46 .
 或いは、図14は、第10変形例に係る電磁継電器1を示す図である。図14に示すように、内側磁石43の一部のみが、絶縁材46で覆われてもよい。内側磁石43は、第1表面431と第2表面432とを含む。第1表面431は、内側磁石43の上面である。第2表面432は、内側磁石43の下面である。第2表面432は、第1表面431よりも第1固定接点10及び第2固定接点11に近い。第2表面432は、第1固定端子6と第2固定端子7との間の空間に面している。内側磁石43のうち少なくとも第2表面432が、絶縁材46で覆われていてもよい。 Alternatively, FIG. 14 is a diagram showing an electromagnetic relay 1 according to a tenth modification. As shown in FIG. 14, only a portion of the inner magnet 43 may be covered with the insulating material 46 . Inner magnet 43 includes a first surface 431 and a second surface 432 . The first surface 431 is the top surface of the inner magnet 43 . A second surface 432 is the lower surface of the inner magnet 43 . The second surface 432 is closer to the first stationary contact 10 and the second stationary contact 11 than the first surface 431 is. The second surface 432 faces the space between the first fixed terminal 6 and the second fixed terminal 7 . At least the second surface 432 of the inner magnet 43 may be covered with the insulating material 46 .
 上記の実施形態では、内側磁石43の全体が、第1方向(X1,X2)において、第1固定端子6と第2固定端子7との間に位置している。すなわち、内側磁石43は、第2方向(Z1,Z2)から見て、第1固定端子6と第2固定端子7とに重ならない位置に配置されている。しかし、内側磁石43の一部が、第2方向(Z1,Z2)から見て、第1固定端子6と第2固定端子7とに重なる位置に配置されてもよい。 In the above embodiment, the entire inner magnet 43 is located between the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2). That is, the inner magnet 43 is arranged at a position not overlapping the first fixed terminal 6 and the second fixed terminal 7 when viewed from the second direction (Z1, Z2). However, a part of the inner magnet 43 may be arranged at a position overlapping the first fixed terminal 6 and the second fixed terminal 7 when viewed from the second direction (Z1, Z2).
 例えば、図15は、第11変形例に係る電磁継電器1を示す図である。図15に示すように、内側磁石43は、中間部分43Aと、第1部分43Bと、第2部分43Cとを含んでもよい。中間部分43Aは、第2方向(Z1,Z2)から見て第1固定端子6と第2固定端子7との間に位置してもよい。中間部分43Aは、第2方向(Z1,Z2)から見て第1固定端子6と第2固定端子7とに重ならなくてもよい。第1部分43Bは、第2方向(Z1,Z2)から見て第1固定端子6と重なっていてもよい。第2部分43Cは、第2方向(Z1,Z2)から見て第2固定端子7と重なっていてもよい。 For example, FIG. 15 is a diagram showing an electromagnetic relay 1 according to an eleventh modification. As shown in FIG. 15, the inner magnet 43 may include an intermediate portion 43A, a first portion 43B and a second portion 43C. 43 A of intermediate parts may be located between the 1st fixed terminal 6 and the 2nd fixed terminal 7 seeing from a 2nd direction (Z1, Z2). 43 A of intermediate parts do not need to overlap the 1st fixed terminal 6 and the 2nd fixed terminal 7, seeing from a 2nd direction (Z1, Z2). The first portion 43B may overlap the first fixed terminal 6 when viewed from the second direction (Z1, Z2). The second portion 43C may overlap the second fixed terminal 7 when viewed from the second direction (Z1, Z2).
 この場合、図16に示すように、第1固定端子6は、第1方向(X1,X2)から見てU字型の形状を有していてもよい。或いは、図17に示すように、第1固定端子6は、第1方向(X1,X2)から見てL字型の形状を有していてもよい。第2固定端子7は、第1固定端子6と同様の形状を有してもよい。 In this case, as shown in FIG. 16, the first fixed terminal 6 may have a U-shape when viewed from the first direction (X1, X2). Alternatively, as shown in FIG. 17, the first fixed terminal 6 may have an L-shape when viewed from the first direction (X1, X2). The second fixed terminal 7 may have the same shape as the first fixed terminal 6 .
 図18は、第12変形例に係る電磁継電器1を示す図である。図18に示すように、第1固定端子6と第2固定端子7とは、第1方向(X1,X2)に延びていてもよい。詳細には、第1固定端子6は、第1固定接点10から第1長手方向(X1)に延びる部分を含んでもよい。第2固定端子7は、第2固定接点11から第2長手方向(X2)に延びる部分を含んでもよい。この場合、図19に示すように、第1固定端子6は、板状の形状であってもよい。第2固定端子7は、第1固定端子6と同様の形状であってもよい。 FIG. 18 is a diagram showing an electromagnetic relay 1 according to a twelfth modification. As shown in FIG. 18, the first fixed terminal 6 and the second fixed terminal 7 may extend in the first direction (X1, X2). Specifically, the first fixed terminal 6 may include a portion extending from the first fixed contact 10 in the first longitudinal direction (X1). The second fixed terminal 7 may include a portion extending from the second fixed contact 11 in the second longitudinal direction (X2). In this case, as shown in FIG. 19, the first fixed terminal 6 may have a plate-like shape. The second fixed terminal 7 may have the same shape as the first fixed terminal 6 .
 本発明によれば、電磁継電器において、固定端子間においてアークが短絡することによる遮断性能の低下を抑えることができる。 According to the present invention, in an electromagnetic relay, it is possible to suppress deterioration in breaking performance due to arc short-circuiting between fixed terminals.
 4:駆動装置, 6:第1固定端子, 6A:第1角部, 7:第2固定端子, 7A:第2角部, 8:可動接触片, 10:第1固定接点, 11:第2固定接点, 12:第1可動接点, 13:第2可動接点, 41:第1外側磁石, 43:内側磁石, 43A:中間部分, 43B:第1部分, 43C:第2部分, 44:第1突出部, 46:絶縁材, 431:第1表面, 432:第2表面
 
4: drive device, 6: first fixed terminal, 6A: first corner, 7: second fixed terminal, 7A: second corner, 8: movable contact piece, 10: first fixed contact, 11: second Fixed contact 12: First movable contact 13: Second movable contact 41: First outer magnet 43: Inner magnet 43A: Intermediate portion 43B: First portion 43C: Second portion 44: First Projection 46: Insulating material 431: First surface 432: Second surface

Claims (8)

  1.  第1固定端子と、
     前記第1固定端子に接続された第1固定接点と、
     前記第1固定端子から、第1方向に離れて配置された第2固定端子と、
     前記第2固定端子に接続された第2固定接点と、
     前記第1方向と交差する第2方向において、前記第1固定接点と向かい合って配置された第1可動接点と、
     前記第2方向において、前記第2固定接点と向かい合って配置された第2可動接点と、
     前記第1可動接点と前記第2可動接点とに接続された可動接触片と、
     前記可動接触片を前記第2方向に移動させる駆動装置と、
     前記第1固定端子と前記第2固定端子との外側に配置され、前記第1固定接点と前記第1可動接点との間と、前記第2固定接点と前記第2可動接点との間とで発生するアークを引き延ばすための磁界を発生させる外側磁石と、
     前記第2方向から見て、少なくとも一部が前記第1固定端子と前記第2固定端子との間に配置され、前記第1方向及び前記第2方向に交差する第3方向へ、前記アークを引き延ばすための磁界を発生させる内側磁石と、
    を備える電磁継電器。
    a first fixed terminal;
    a first fixed contact connected to the first fixed terminal;
    a second fixed terminal spaced apart in a first direction from the first fixed terminal;
    a second fixed contact connected to the second fixed terminal;
    a first movable contact arranged to face the first fixed contact in a second direction that intersects with the first direction;
    a second movable contact arranged to face the second fixed contact in the second direction;
    a movable contact piece connected to the first movable contact and the second movable contact;
    a driving device for moving the movable contact piece in the second direction;
    arranged outside the first fixed terminal and the second fixed terminal, between the first fixed contact and the first movable contact and between the second fixed contact and the second movable contact; an outer magnet for generating a magnetic field for stretching the generated arc;
    At least a portion of the arc is arranged between the first fixed terminal and the second fixed terminal when viewed from the second direction, and the arc is directed in a third direction crossing the first direction and the second direction. an inner magnet for generating a magnetic field for stretching;
    An electromagnetic relay with
  2.  前記外側磁石に対して前記第3方向に配置され、前記内側磁石に向かって延びる突出部をさらに備える、
    請求項1に記載の電磁継電器。
    further comprising a protrusion disposed in the third direction with respect to the outer magnet and extending toward the inner magnet;
    The electromagnetic relay according to claim 1.
  3.  前記突出部は、前記内側磁石に向かって先細りの形状を有する、
    請求項2に記載の電磁継電器。
    the protrusion has a tapered shape toward the inner magnet,
    The electromagnetic relay according to claim 2.
  4.  前記突出部は、絶縁材製である、
    請求項2又は3に記載の電磁継電器。
    The protrusion is made of an insulating material,
    The electromagnetic relay according to claim 2 or 3.
  5.  前記第1固定端子は、前記第1固定端子の外側へ向かう第1角部を含む、
    請求項1から4のいずれかに記載の電磁継電器。
    The first fixed terminal includes a first corner directed outward of the first fixed terminal,
    The electromagnetic relay according to any one of claims 1 to 4.
  6.  前記第2固定端子は、前記第2固定端子の外側へ向かう第2角部を含む、
    請求項1から5のいずれかに記載の電磁継電器。
    The second fixed terminal includes a second corner facing outward of the second fixed terminal,
    The electromagnetic relay according to any one of claims 1 to 5.
  7.  前記内側磁石は、
      第1表面と
      前記第1表面よりも前記第1固定接点及び前記第2固定接点に近い第2表面と、
     を含み、
     前記内側磁石のうち少なくとも前記第2表面は。絶縁材で覆われている、
    請求項1から6のいずれかに記載の電磁継電器。
    The inner magnet is
    a first surface; and a second surface closer to the first stationary contact and the second stationary contact than the first surface;
    including
    at least the second surface of the inner magnet; covered with insulation,
    The electromagnetic relay according to any one of claims 1 to 6.
  8.  前記内側磁石は、
      前記第2方向から見て前記第1固定端子と前記第2固定端子との間に位置する中間部分と、
      前記第2方向から見て前記第1固定端子と重なる第1部分と、
      前記第2方向から見て前記第2固定端子と重なる第2部分と、
     を含む、
    請求項1から7のいずれかに記載の電磁継電器。
     
    The inner magnet is
    an intermediate portion positioned between the first fixed terminal and the second fixed terminal when viewed from the second direction;
    a first portion that overlaps with the first fixed terminal when viewed from the second direction;
    a second portion that overlaps with the second fixed terminal when viewed from the second direction;
    including,
    The electromagnetic relay according to any one of claims 1 to 7.
PCT/JP2022/001484 2021-03-05 2022-01-18 Electromagnetic relay WO2022185746A1 (en)

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CN202280015556.0A CN116888702A (en) 2021-03-05 2022-01-18 Electromagnetic relay
US18/278,619 US20240128034A1 (en) 2021-03-05 2022-01-18 Electromagnetic relay
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Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2011204480A (en) * 2010-03-25 2011-10-13 Panasonic Electric Works Co Ltd Contact device
JP2014110094A (en) * 2012-11-30 2014-06-12 Fuji Electric Co Ltd Contact point device and electromagnetic switch using the same
JP2016012505A (en) * 2014-06-30 2016-01-21 富士電機機器制御株式会社 Contact mechanism, and electromagnetic contactor employing the same
JP2019096474A (en) * 2017-11-22 2019-06-20 富士電機機器制御株式会社 Contact mechanism and electromagnetic contactor using the same
JP2020030911A (en) * 2018-08-21 2020-02-27 オムロン株式会社 relay

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011204480A (en) * 2010-03-25 2011-10-13 Panasonic Electric Works Co Ltd Contact device
JP2014110094A (en) * 2012-11-30 2014-06-12 Fuji Electric Co Ltd Contact point device and electromagnetic switch using the same
JP2016012505A (en) * 2014-06-30 2016-01-21 富士電機機器制御株式会社 Contact mechanism, and electromagnetic contactor employing the same
JP2019096474A (en) * 2017-11-22 2019-06-20 富士電機機器制御株式会社 Contact mechanism and electromagnetic contactor using the same
JP2020030911A (en) * 2018-08-21 2020-02-27 オムロン株式会社 relay

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KR20230130106A (en) 2023-09-11
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